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VERSIÓ 1.3

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- [NEW] shader.init(), shader.enable i shader.disable
- [NEW] Deixe els shaders de Lynx i GBC de exemple.
- [NEW] file_getfilebuffer() ara soporta un tercer paràmetre opcional, per a 'zeroterminar' el buffer per si es un arxiu de text.
This commit is contained in:
Raimon Zamora
2025-06-18 19:29:17 +02:00
parent 79781bbed1
commit e1d5eb051c
14 changed files with 213 additions and 67 deletions
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55
jshader.cpp
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@@ -24,7 +24,8 @@ namespace shader
SDL_Texture* backBuffer = nullptr;
SDL_Point win_size = {640, 480};
SDL_FPoint tex_size = {320, 240};
bool usingOpenGL;
bool can_use_opengl = false;
bool using_opengl = false;
GLuint texture_number;
GLuint nose;
@@ -40,11 +41,13 @@ namespace shader
PFNGLDELETESHADERPROC glDeleteShader;
PFNGLATTACHSHADERPROC glAttachShader;
PFNGLCREATEPROGRAMPROC glCreateProgram;
PFNGLDELETEPROGRAMPROC glDeleteProgram;
PFNGLLINKPROGRAMPROC glLinkProgram;
PFNGLVALIDATEPROGRAMPROC glValidateProgram;
PFNGLGETPROGRAMIVPROC glGetProgramiv;
PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;
PFNGLUSEPROGRAMPROC glUseProgram;
PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation;
bool initGLExtensions() {
glCreateShader = (PFNGLCREATESHADERPROC)SDL_GL_GetProcAddress("glCreateShader");
@@ -55,16 +58,18 @@ namespace shader
glDeleteShader = (PFNGLDELETESHADERPROC)SDL_GL_GetProcAddress("glDeleteShader");
glAttachShader = (PFNGLATTACHSHADERPROC)SDL_GL_GetProcAddress("glAttachShader");
glCreateProgram = (PFNGLCREATEPROGRAMPROC)SDL_GL_GetProcAddress("glCreateProgram");
glDeleteProgram = (PFNGLDELETEPROGRAMPROC)SDL_GL_GetProcAddress("glDeleteProgram");
glLinkProgram = (PFNGLLINKPROGRAMPROC)SDL_GL_GetProcAddress("glLinkProgram");
glValidateProgram = (PFNGLVALIDATEPROGRAMPROC)SDL_GL_GetProcAddress("glValidateProgram");
glGetProgramiv = (PFNGLGETPROGRAMIVPROC)SDL_GL_GetProcAddress("glGetProgramiv");
glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)SDL_GL_GetProcAddress("glGetProgramInfoLog");
glUseProgram = (PFNGLUSEPROGRAMPROC)SDL_GL_GetProcAddress("glUseProgram");
glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)SDL_GL_GetProcAddress("glGetUniformLocation");
return glCreateShader && glShaderSource && glCompileShader && glGetShaderiv &&
glGetShaderInfoLog && glDeleteShader && glAttachShader && glCreateProgram &&
glLinkProgram && glValidateProgram && glGetProgramiv && glGetProgramInfoLog &&
glUseProgram;
glDeleteProgram && glLinkProgram && glValidateProgram && glGetProgramiv &&
glGetProgramInfoLog && glUseProgram && glGetUniformLocation;
}
#endif
@@ -92,6 +97,7 @@ namespace shader
GLchar *log = (GLchar*)malloc(logLength);
glGetShaderInfoLog(result, logLength, &logLength, log);
std::cout << "Shader compile log:" << log << std::endl;
//std::cout << source << std::endl;
free(log);
}
glDeleteShader(result);
@@ -105,7 +111,9 @@ namespace shader
GLuint programId = 0;
GLuint vtxShaderId, fragShaderId;
if (programId != 0) glDeleteProgram(programId);
programId = glCreateProgram();
vtxShaderId = compileShader(vertexShaderSource, GL_VERTEX_SHADER);
fragShaderId = compileShader(fragmentShaderSource?fragmentShaderSource:vertexShaderSource, GL_FRAGMENT_SHADER);
@@ -161,25 +169,36 @@ namespace shader
if(!strncmp(renderer_name, "opengl", 6)) {
#ifndef __APPLE__
if (!initGLExtensions()) {
std::cout << "WARNING: No s'han pogut inicialitzar les extensions d'OpenGL!" << std::endl;
usingOpenGL = false;
return false;
static bool gl_extensions_initialized = false;
if (!gl_extensions_initialized) {
if (!initGLExtensions()) {
std::cout << "WARNING: No s'han pogut inicialitzar les extensions d'OpenGL!" << std::endl;
can_use_opengl = false;
return false;
}
gl_extensions_initialized = true;
}
#endif
// Compilar el shader y dejarlo listo para usar.
if (!vertexShader) {
can_use_opengl = false;
return false;
}
programId = compileProgram(vertexShader, fragmentShader);
} else {
std::cout << "WARNING: El driver del renderer no es OpenGL." << std::endl;
usingOpenGL = false;
can_use_opengl = false;
return false;
}
usingOpenGL = true;
can_use_opengl = true;
return true;
}
unsigned char pixels[512*240*4];
void enable() { if (can_use_opengl) using_opengl = true; }
void disable() { using_opengl = false; }
void render()
{
SDL_FlushRenderer(renderer);
@@ -188,7 +207,7 @@ namespace shader
SDL_RenderClear(renderer);
SDL_FlushRenderer(renderer);
if (usingOpenGL)
if (using_opengl)
{
GLint oldProgramId;
if (programId != 0)
@@ -206,16 +225,16 @@ namespace shader
//glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &param);
//printf("tex width: %i\n", param);
glViewport(0, 0, win_size.x, win_size.y);
glBegin(GL_TRIANGLE_STRIP);
glTexCoord2f(0.0f, 0.0f);
glVertex2f(0.0f, 0.0f);
glTexCoord2f(1.0f, 0.0f);
glVertex2f(tex_size.x, 0.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex2f(0.0f, tex_size.y);
glTexCoord2f(1.0f, 1.0f);
glVertex2f(tex_size.x, tex_size.y);
glVertex2f(-1.0f, -1.0f);
glTexCoord2f(tex_size.x, 0.0f);
glVertex2f(1.0f, -1.0f);
glTexCoord2f(0.0f, tex_size.y);
glVertex2f(-1.0f, 1.0f);
glTexCoord2f(tex_size.x, tex_size.y);
glVertex2f(1.0f, 1.0f);
glEnd();
SDL_GL_SwapWindow(win);